"For the last year I have been experimenting with the new approach to a Behaviour-Driven Development, which could be summarised as "Ubiquitous Language is a thing again". The core premise of this approach is that if you take Ubiquitous Language seriously and push for it in your scenarios, you open the door to doing a Domain-Driven Design while you're doing Behaviour-Driven Development's red-green-refactor cycle. By embedding Ubiquitous Language in your scenarios, your scenarios naturally become your domain model, which you can use to develop the most important part of your application - a core domain."